NWS Forecast Office Houston/Galveston, TX

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Last Map Update: Tue, Sep 22, 2026 at 10:34:41 am CDT

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Air Quality Alert

Today

Wednesday

Ozone Action Day

Seven Day Outlook

Autumnal Equinox

Today will be hot with highs in the 90s. There is a 20-30% chance of showers and thunderstorms during the daytime. Tonight will be warm with early morning lows in the 70s to lower 80s. There is a 20-30% chance of showers overnight, mainly near the coast and portions of the Brazos Valley.

Wednesday will be hot with highs in the 90s. There is a 20-30% chance of showers and thunderstorms during the daytime, mainly near the coast. Wednesday night will be warm with early morning lows in the 70s to lower 80s.

Ozone Action Day is in effect for Tuesday, September 22nd, 2026. This means air quality could be unhealthy for sensitive groups.

Hot weather continues with highs in the upper 80s/90s. Early morning lows will be in the 70s/mid 80s. Isolated showers and storms will be possible through the first half of the week. A weak frontal boundary pushes into the region on Thursday, bringing drier weather, slim to none rain chances, and a slight decrease in temperatures. Rain chances rise Sunday into next week.

The autumnal equinox occurs on Tuesday, September 22nd, and 7:04 PM CDT and marks the beginning of the astronomical season of fall.

Current Weather Observations...

Location	Time (CDT)	Weather	Vsby. (SM)	Temp. (ºF)	Dewpt. (ºF)	Hum. (%)	Wind (mph)	Wind Chill / Heat Index (ºF)	Pres. (in)
Bryan	09:55	Clear	10	84	74	70	CALM	92 [HI]	30.05
College Station	09:53	Clear	10	84	75	74	CALM	92 [HI]	30.02
Caldwell	09:55	Clear	10	84	73	70	CALM	-	30.04
Huntsville	09:53	Clear	10	84	75	74	NW 3	92 [HI]	30.03
Navasota	09:55	Clear	10	86	80	81	CALM	100 [HI]	30.01
Brenham	10:15	Partly Cloudy	10	86	74	69	NE 3	94 [HI]	30.02
Conroe	09:53	Clear	10	85	76	74	NW 6	94 [HI]	30.02
Cleveland	10:15	Clear	10				NNW 7	-	30.02
Liberty	10:15	Clear	10	86	78	79	NNW 8	98 [HI]	29.98
Columbus	10:15	Partly Cloudy	10	86	75	71	CALM	95 [HI]	30.02
Spring	09:53	Clear	9	85	76	74	CALM	94 [HI]	30.01
Houston Intercontinental Aprt	09:53	Mostly Clear	10	86	77	74	WNW 5	97 [HI]	30.00
Katy/Brookshire	10:15	Partly Cloudy	10	86	78	79	CALM	98 [HI]	30.02
Texas Medical Center Heliport	09:55	Clear	10	84	77	79	VRB 6	94 [HI]	29.99
Sugar Land	09:53	Clear	10	85	78	80	NNE 6	97 [HI]	29.99
Houston Hobby Airport	09:53	Mostly Clear	10	85	77	77	NNW 7	95 [HI]	29.98
Arcola/Sienna	10:15	Partly Cloudy	10	87	78	74	NE 5	101 [HI]	30.01
Pearland	09:53	Clear	9	85	76	74	N 6	94 [HI]	30.01
Ellington Field	08:54	Clear	10	84	77	79	N 6	94 [HI]	29.98
La Porte	09:55	Clear	10	86	77	74	N 9	97 [HI]	30.00
Wharton	10:15	Partly Cloudy	10	86	76	74	CALM	96 [HI]	30.01
Galveston	10:52	Mostly Clear	10	89	77	67	E 10	102 [HI]	30.18
Bay City	10:15	Mostly Clear	10				VRB 6	-	29.95
Palacios	09:53	Mostly Clear	10	86	77	74	NE 7	97 [HI]	29.97
Rig 20 Miles SE of Galveston	10:15	Partly Cloudy	10	86	77	74	NNE 10	97 [HI]	30.00
Rig 20 Miles SE of Matagorda	10:20		10	87	77	70	NE 12	99 [HI]	30.01

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